Humble plants can hide surprising secrets, as biologist Ameenah Gurib-Fakim shows us when she introduces us to rare plant species from isolated islands and regions of Africa. Meet the shape-shifting benjoin; the baume de l’ile plate, which might offer a new treatment for asthma; and the iconic baobab tree, which could hold the key to the future of food. Plus: monkey apples. Watch ยป Step – Acquire